The pilot reported that, during takeoff on a beach, the airplane lifted off the ground to about 10 ft but he "felt something holding [him] down." He lowered the nose to build up the airspeed, attempted to climb again, but was unable to climb due to a downdraft. He was unable to abort the takeoff due to increased airspeed and reduced landing area prior to a 50 ft bank. He decided to "pull up and go over that 50 to 60 ft bank." The airplane continued about three-quarters of a mile, aerodynamically stalled, and the empennage impacted terrain. The airplane continued about 30 ft, struck a "big clump of dirt," and nosed over.
The airplane sustained substantial damage to the left wing.
The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
The pilot reported that the wind was variable at 27 knots, gusting to 36 knots.